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Edexcel A2 C3 Mathematics 12th June 2015

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Original post by kingaaran
75/75

It took me a whole 20 minutes to figure out that I'd need to apply the difference of two squares for that trig question!

However, I felt that paper challenged me in very similar way to how June 2014 did, so I'd anticipate similar grade boundaries (probably 1/2 marks lower).


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I was so happy when I worked that out
Original post by AbubakarB
nope one to many. one x value will give you many y values :smile:

oh and the question was asking why it wont be a function


You wrong he's right.


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[QUOTE="paradoxicalme;56927315"]
Original post by blueberry389


I used 3.1 as well and still got 13.9 (because y=17-x).


same but if you subbed it into the other equation you get 14. something
[QUOTE="paradoxicalme;56927315"]
Original post by blueberry389


I used 3.1 as well and still got 13.9 (because y=17-x).


i used the other formulae tho ie. y=2^(x+1)-3

is that alright>
For the values of k where there are no solutions I got the inequalities the wrong way round but with the right values would I still get 1 mark out of 2.
Original post by physicsmaths
You wrong he's right.


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I probably misunderstood the way he phrased his response, we're both correct.

The question was asking why the inverse of the function does not exist.

you can say either

the function g(x) is many to one
or
the inverse g-1(x) would be one to many thus not a function.
Original post by nayilgervinho
For the values of k where there are no solutions I got the inequalities the wrong way round but with the right values would I still get 1 mark out of 2.


Probably will be B1 B1 tbh, so unlikely.


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If you misread a question how many marks do you get?
Do you think 65/66 would be an A?
[QUOTE=radhikagulati;56927759]Do you think 65/66 would be an A?

Definitely
Original post by AbubakarB
nope one to many. one x value will give you many y values :smile:

oh and the question was asking why it wont be a function


The question asked why there wasn't an inverse function... And it is many-one, not one-many
Original post by anonwinner
The question asked why there wasn't an inverse function... And it is many-one, not one-many


Yep i got that here's what i said earlier.

Original post by AbubakarB
I probably misunderstood the way he phrased his response, we're both correct.

The question was asking why the inverse of the function does not exist.

you can say either

the function g(x) is many to one
or
the inverse g-1(x) would be one to many thus not a function.


should both be right...well according to my teacher :s
Original post by Elliemay97
Can any guess what raw mark a B would be?


50 to 51 out of 75
Original post by AbubakarB
Yep i got that here's what i said earlier.



should both be right...well according to my teacher :s


Oh sorry I misunderstood what you said. Yes I think you will be right, I remember seeing something similar in a mark scheme
Original post by anonwinner
Oh sorry I misunderstood what you said. Yes I think you will be right, I remember seeing something similar in a mark scheme


No worries, cheers mate, all the best :smile:
Would just writing it is not a one-to-one function get me the mark?
Original post by physicsmaths
Nice one mate. Me too.


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Original post by kingaaran
75/75

It took me a whole 20 minutes to figure out that I'd need to apply the difference of two squares for that trig question!

However, I felt that paper challenged me in very similar way to how June 2014 did, so I'd anticipate similar grade boundaries (probably 1/2 marks lower).


Posted from TSR Mobile


..
67.jpg48.8KB
Original post by raypalmer
BRUV EDEXCEL CAN SUCK THEIR MOTHERS WITH FINESSE, WHAT EVEN WAS THAT EXAM, I WOULD LOVE TO TEST ALL THEIR CHINS, FKIN INBREDS


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71.jpg
... full sympathy to anyone who may be upset after an exam ...
Original post by raypalmer
BRUV EDEXCEL CAN SUCK THEIR MOTHERS WITH FINESSE, WHAT EVEN WAS THAT EXAM, I WOULD LOVE TO TEST ALL THEIR CHINS, FKIN INBREDS


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Looooooolll
Any predictions for an A or a B?

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